XPIC can be used with ATPC, but it is generally not recommended. If you need to use it together, what should you pay attention to? (Multiple choice)
A . In conjunction with AM, set the upper threshold of the ATPC to the lower threshold plus 5d
C . A group of XPIC’s horizontal polarization direction links and vertical polarization direction links should be configured with the same ATPC parameters (ATPC enable, ATPC adjustment threshold).
D . Set the difference between the upper and lower thresholds of ATPC as small as possible, and it is recommended to be 5d
F . Set the lower threshold of ATPC to be greater than the planned AM sensitivity in the full capacity modulation mode plus 14d
Answer: BC